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Cisco Bug: CSCtb28877 - c3945:Crashes when debug tftp packet is enabled

Last Modified

Aug 18, 2017

Products (1)

  • Cisco IOS

Known Affected Releases

12.4(24.6)PI11p 15.0(1)M

Description (partial)


Crash occurs on router configured as tftp-server when IPV6
addresses are used for tftp copy and tftp packet/event debugs have been
enabled on the server router.


1) a router is configured as tftp server and 
IPV6 addresses are configured on both the server and
client interfaces and the IPV6 addresses are used 
for the tftp copy.
2) deb  tftp packets/events  is configured on tftp server router.

This crash can occur only if all three of the following conditions are true:
- tftp-server entries are configured
- ''debug tftp packet'' is switched on
- the device receives TFTP read requests in IPv6 packets
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